Improvement in gearings



A, G. HBINLE.

Gearing.

No. 214,821. m Pa tentedw April 29, 1879..

UNI ED STATES PATENT OFFICE.

ALBERT Gr. HEINLE, OF PITTSBURG, PENNSYLVANIA.

IM PVROVEMENT IN GEARINGS.

Specification forming part of Letters Patent No. 214,821. dated April29, 1879; application filed October 4, 1878.

. clear, and exact description of the invention,

such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings,

which form part of this specification, in which Figure 1 is a frontelevation of my invention. Fig. 2 is a front elevation of modification.Fig. 3 is a sectional view of modification.

This invention relates to a novel construction of toothed gearing andarrangement thereof and consists, primarily, in combining in one systemtoothed wheels and friction-wheels, acting cooperatively, thefriction-wheels being integral with their toothed mates, substantiallyas hereinafter described and claimed.

My invention also consists in the specific construction, combination,and arrangement of parts, as hereinafter described and claimed.

The drawings illustrate my invention as applied to rolling-mill pinionsfor a two-high train of rolls.

A designates the housings, and B G the pinions. Both pinions have theusual teeth or cogs a, which may be straight, spiral, curved, V-shaped,or otherwise, according to the .desire of the maker. Pinion B has ateach end the smooth collars b and grooves 0, having inclined sides forfriction-surfaces. Pinion G has correspondingly-situated grooves b andcollars c, similarly inclined on their sides.

The pitch-line is about the same for the collars as for the cogs, andthe latter are so constructed with reference to their respective groovesas to leave room for taking up wear, as shown. Thus the inclined sidesof the collars and grooves bear upon each other and afford a gripewhich, while very greatly assisting the teeth in their function,prevents the jarring and sudden strain on the teeth which proves somyurious.

Other important advantages are derived from such aconstruction.

In three high pinions the intermediate brasses are dispensed with, asthe collars and grooves afford the required bearings. Should a toothbreak or become so worn as to refuse to bite, the friction-collars forcethe revolution beyond the defective tooth, and thus prevent spoiling apass frequently. The pinions are not so exposed to the dangers ofbacklash.

In two-high pinions, should a wabbler twist off, the same facilities forinversion exist as with ordinary pinions. To acquire like facilities forthree-high gearing it is only necessary to construct the combined toothand friction pinions with alternating ends, as in Fig. 2. Thefriction-surfaces are then iuterchangeable, the middle pinion having atone end a collar, and at the corresponding point on the other end agroove, and the other pinions being made in like manner. If the middlewabbler break or twist off it can be interchanged with the upper orlower pinion, as with the ordinary gearing.

The invention admits of an almost infinite variety of uses. It can beapplied .to the different styles of gear, such as spur-and-pinion,beveled gear, mitergear, rack-and-pinion, sun-and-planet, and others,and in all cases effects the same smoothness of motion, freedom fromknocking, and complete absence of the irritating rattle and noiseincident to toothed gearing of all descriptions. The consequence is,that my form of gear will not wear out as rapidly as those now made,which are subject to the above causes of wear. The teeth are not subjectto sudden and injurious strains, and hence are not liable to snap off,and if such an accident should happen I have the friction-surfaces tomaintain the motion.

Theseforms of gear are most conveniently made by casting in one pieceboth the toothed and frictionportions, though they may be madeseparately and connected.

I claim as my invention and desire to secure by Letters Patent- 1. Asystem of two or more toothed gears, each having one or morefriction-surfaces engaging with corresponding friction-surfaces on theother or others, each friction-wheel being integral with its toothedinate, substantially as described, whereby when two or more such asdescribed.

pinions are placed together they are inter-,

2. Atoothed gear-wheel having. one or more changeable.

friction collars or grooves, all of like pitch,

I11 testimonythat I claim the foregoin gI have substantially asdescribed, as a new article of hereunto set my hand this 27th day ofSeptemfm anufacture.

3. A rolling-mill pinion having cogs at one portion, and afriction-collar and a frictiongroove, both at respectively.corresponding points with relation to the cogs, substantially ber,1878. ALBERT G. HEINLE. Witnesses:

JAMES J. MCTIGHE, T. J. MCTIGHE.

